export default  {
	"title": 'Java语言程序设计_在线3',
	"testId": '63777',
	"praxiseList": [
		{
			"id": 84470,
			"title": "结构化程序设计中调用函数，重用的是什么代码？",
			"options": "[\"数据代码+算法代码\",\"程序员\",\"数据代码\",\"算法代码\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84471,
			"title": "下列关于组合类的描述中，正确的是（   ）。",
			"options": "[\"方法成员调用了类类型对象的方法成员，这样的类被称为组合类\",\"方法成员访问了类类型对象的字段成员，这样的类被称为组合类\",\"组合类字段成员中不能包含非对象字段，即用基本数据类型定义的字段\",\"字段成员中包含类类型的对象字段，这样的类被称为组合类\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84472,
			"title": "下列关于组合类对象字段的描述中，错误的是（   ）。",
			"options": "[\"所谓对象字段，就是用类定义的对象\",\"对象字段还包含下级成员\",\"组合类中的方法成员访问对象字段的下级成员不受权限控制\",\"组合类设定对象字段的访问权限是对其进行二次封装\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84473,
			"title": "继承超类得到新的子类，子类中将不包括超类的哪种成员？",
			"options": "[\"超类的私有成员\",\"超类的保护成员\",\"超类的构造方法\",\"超类的公有成员\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84474,
			"title": "在定义方法成员时前面加关键字final，其含义是（   ）。",
			"options": "[\"子类不能调用该方法\",\"该方法不能修改类中的字段成员\",\"子类不能重写该方法\",\"该方法不能被调用\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84475,
			"title": "下列关于组合类构造对象字段的描述中，错误的是（   ）。",
			"options": "[\"组合类可以在构造方法中为对象字段创建对象\",\"定义组合类对象时可以向构造方法传递已经创建好的对象\",\"不同组合类对象的对象字段不能共用对象，即不能引用同一个对象\",\"组合类可以在类中定义对象字段时直接创建对象\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84476,
			"title": "结构化程序设计中使用结构体定义变量，重用的是什么代码？",
			"options": "[\"算法代码\",\"程序员\",\"数据代码\",\"数据代码+算法代码\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84477,
			"title": "面向对象程序设计中重用类代码的形式不包括下列哪一种？",
			"options": "[\"拷贝类代码\",\"类的继承\",\"用类定义对象\",\"类的组合\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84478,
			"title": "对象多态性指的是下列哪一种现象？",
			"options": "[\"调用不同对象的同名方法成员，会得到不同的处理结果\",\"显示不同对象的同名字段成员，会得到不同的显示结果\",\"调用同一对象的不同方法成员，会得到不同的处理结果\",\"显示同一对象的不同字段成员，会得到不同的显示结果\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84479,
			"title": "下列关于对象替换与多态的描述中，错误的是（   ）。",
			"options": "[\"通过类的继承与扩展可以实现类代码的重用\",\"通过对象替换与多态可以实现类代码的重用\",\"对象替换与多态的基础是子类与超类之间具有相似性\",\"对象替换与多态的目的是为了提高程序中算法代码的重用性\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84480,
			"title": "下列哪种场合不应该使用内部类？",
			"options": "[\"当希望将若干个类归成一组管理时，可以将它们集中定义到某个外部类中\",\"当只被某一个类使用的时候，可以将类定义成该类的内部类\",\"当希望访问某个类的私有成员时，可以将类定义成该类的内部类\",\"当一个类被广泛使用的时候，可以将该类定义成某个类的内部类\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84481,
			"title": "下列关于匿名类的描述中，错误的是（   ）。",
			"options": "[\"匿名类可以实现多个接口\",\"匿名类最多只能继承一个超类\",\"省略掉类名的局部类被称为匿名类\",\"匿名类必须继承某个超类或实现某个接口\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84482,
			"title": "下列关于匿名方法的描述中，错误的是（   ）。",
			"options": "[\"匿名方法是一个抽象方法，即只有方法签名\",\"省略掉方法名和返回值类型的方法被称为匿名方法\",\"匿名方法具有形参列表\",\"匿名方法具有方法体\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84483,
			"title": "下列关于抽象类的描述中，错误的是（   ）。",
			"options": "[\"抽象类可以作为超类定义子类\",\"含有抽象方法的类称为抽象类，定义时必须使用关键字abstract\",\"不能使用抽象类创建对象，即抽象类不能实例化\",\"不能定义抽象类的引用变量\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84484,
			"title": "接口是一种特殊的抽象类，其成员中不能包含（   ）。",
			"options": "[\"protected抽象字段\",\"public静态只读字段\",\"public静态方法\",\"public抽象方法\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84485,
			"title": "下列关于继承类和实现接口的描述中，正确的是（   ）。",
			"options": "[\"类只能单继承，接口只能单实现\",\"类只能单继承，接口可以多实现\",\"类可以多继承，接口只能单实现\",\"类可以多继承，接口可以多实现\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84486,
			"title": "下列关于接口的描述中，错误的是（   ）。",
			"options": "[\"接口可以用来创建对象\",\"接口是一种引用数据类型\",\"接口引用变量可以引用其子类对象\",\"接口可以用来定义引用变量\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84487,
			"title": "如果Java API说明文档没有给出类成员的访问权限，则该类成员的权限是（   ）。",
			"options": "[\"protected\",\"private\",\"public\",\"默认权限\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84488,
			"title": "下列哪个类不是Java API中的字符串类？",
			"options": "[\"StringBuffer\",\"Character\",\"String\",\"StringBuilder\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84489,
			"title": "下列哪个类不是Java API中的基本数据类型包装类？",
			"options": "[\"Byte\",\"Float\",\"Double\",\"Int\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84490,
			"title": "下列哪个类不是数值类Number的子类？",
			"options": "[\"Double\",\"Float\",\"Byte\",\"Boolean\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84491,
			"title": "对象类Object中将对象转成字符串的方法是（   ）。",
			"options": "[\"finalize()\",\"equals()\",\"toString()\",\"hashCode()\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84492,
			"title": "Java语言中所有类都包含的成员是（   ）。",
			"options": "[\"compareTo()\",\"toString()\",\"valueOf()\",\"length()\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84493,
			"title": "Java程序中的语法错误主要通过下列哪种方式来排查？",
			"options": "[\"运行测试\",\"Java虚拟机\",\"Java编译器\",\"Java异常处理机制\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84494,
			"title": "下列哪条抛出异常对象的语句是错误的？",
			"options": "[\"throw new Exception();\",\"Exception e = new Exception();  throw e;\",\"throw new String();\",\"throw new IOException ();\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84495,
			"title": "在try-catch语句中，下列哪个子句可能不会执行？",
			"options": "[\"try子句\",\"其他三个选项都有可能\",\"finally子句\",\"catch子句\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84496,
			"title": "下列关于泛型类的描述中，错误的是（   ）。",
			"options": "[\"带类型参数的类被称为泛型类\",\"类型形参可指代某种具体的数据类型\",\"使用泛型类时可省略类型实参\",\"使用泛型类可定义出不同类型的具体类\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84497,
			"title": "下列关于泛型的描述中，错误的是（   ）。",
			"options": "[\"带类型参数的接口被称为泛型接口\",\"带类型参数的类被称为泛型类\",\"带类型参数的类被称为泛型类\",\"带类型参数的字段被称为泛型字段\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84498,
			"title": "双端队列类LinkedList<E>可实现下列哪种功能？",
			"options": "[\"堆栈\",\"字典\",\"动态数组\",\"无序集\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "æ ",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84499,
			"title": "æ å°ç±»HashMap<K, V>å¯å®ç°ä¸ååªç§åè½ï¼",
			"options": "[\"æ åºéå\",\"å­å¸\",\"å æ \",\"å¨ææ°ç»\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "æ ",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84500,
			"title": "C/C++è¯­è¨ä¸­ææ°ç»ãæä¸¾ç±»åãèåä½åç»æä½ç­èªå®ä¹æ°æ®ç±»åï¼Javaè¯­è¨æ æ³æè¿°å¶ä¸­çåªç§æ°æ®ç±»åï¼",
			"options": "[\"æä¸¾ç±»å\",\"ç»æä½\",\"æ°ç»\",\"èåä½\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "æ ",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84501,
			"title": "è¿åæä¸¾ç±»åä¸­æä¸¾å¸¸éæ°ç»çæ¹æ³æ¯ï¼   ï¼ã",
			"options": "[\"ordinal()\",\"values()\",\"name()\",\"toString()\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "æ ",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84502,
			"title": "æ åæ ¼å¼è¾å¥å½æ°scanf()å¯ä»¥ä»é®çä¸æ¥æ¶ä¸åæ°æ®ç±»åçæ°æ®é¡¹ã",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "æ ",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84503,
			"title": "æ åæ ¼å¼è¾å¥å½æ°scanf()å¯ä»¥ä»é®çä¸æ¥æ¶ä¸åæ°æ®ç±»åçæ°æ®é¡¹ã",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "æ ",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84504,
			"title": "æä¸¾ç±»åä¸­çåç´ é½å·æä¸ä¸ªæ´åå¼ã",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "æ ",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84505,
			"title": "æä¸¾ç±»åä¸­çåç´ é½å·æä¸ä¸ªæ´åå¼ã",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "æ ",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84506,
			"title": "ææå½æ°æ¯å¨å¯¹è±¡ççå­æå³å°ç»æçæ¶å»è¢«èªå¨è°ç¨çã",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "æ ",
			"regtime": "2021-03-03 14:32:43",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84507,
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